III/ Choose the best option. 11. The cattle drank from a river polluted with ->(toxic) <-chemicals. a. waste b. colorless c. odorless d. poisonous 12. When the wastes are poured into the atmosphere, the air becomesz( contaminated) and unpleasant to breathe. a. dense b. dirty c. pure d. spoiled 13. They were sent to a local ______________ right after their parents’ death. a. orphanage b. hospital c. park d. prison 14. Cuc Phuong National Park is ______________ 160 km South West of Ha Noi. a. lied b. established c. abandoned d. located